It’s the third of Welsh’s books to be adapted for the cinema, after 1996’s Trainspotting and 1998’s The Acid House. As with those, it’s a satirically edged story, largely set in Edinburgh’s drug-addicted underworld. Welsh is said to be very impressed with Sinclair’s performance in the film, and the appreciation goes both ways.

‘Like many Scots, I’d been a fan of Irvine Welsh’s novels for years so this was really a dream role,’ said Sinclair. ‘I’m really proud of the finished film and the buzz about it online has been incredible. I just can’t wait to see the reaction to it at Toronto.’

Heydon added, 'I want Ecstasy to be the most viscerally thrilling, emotionally exhilarating and life-affirming film. Many of the film’s events are violent and shocking, but above it all, I feel passionately this is a story of great hope, love and rekindling faith.'